Radiant new mum Joanne Beckham and boyfriend Kris Donnelly step out for first time with their baby daughter Peggy as they support her brother David at Kent & Curwen LFW show

She's the sister of football icon David Beckham, who welcomed the birth of her first child, daughter Peggy, with her boyfriend Kris Donnelly just three weeks ago.

And Joanne Beckham, 35, looked positively radiant when she stepped out with her 33-year-old partner and their adorable offspring on Sunday, in support of her famous sibling's Kent & Curwen's presentation at London Fashion Week Men's.

Walking beside her own mother Sandra, Joanne cut a stylish figure in an all-black ensemble that included a smart long coat, skinny jeans, boots and a baker boy cap as she entered the brand's Floral Street store for the anticipated showcase.

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Beaming: Joanne Beckham and partner Kris Donnelly took their newborn daughter Peggy to Kent & Curwen's presentation at London Fashion Week Men's on Sunday. They were joined by her mother Sandra

Beaming: Joanne Beckham and partner Kris Donnelly took their newborn daughter Peggy to Kent & Curwen's presentation at London Fashion Week Men's on Sunday. They were joined by her mother Sandra

With her long blonde hair worn in a lustrous blowout, the new mum kept her makeup light and natural as she walked beside former Big Brother contestant Kris, who was tasked with pushing their child in her pram through Covent Garden's busy streets.

Kris also looked stylish for the outing, matching his girlfriend's choice of headgear, which he teamed with a fitted zip-up jacket, which featured lapels.

The new parents appeared to be in high spirits ahead of the fashion show, laughing raucously with family matriarch Sandra before joining the well-heeled crowd.

Happy family: Joanne looked radiant as she arrived in style - just three weeks after giving birth

Happy family: Joanne looked radiant as she arrived in style - just three weeks after giving birth

Glam girl: The beauty kept things comfortable for the outing in all-black, but maintained a usual hint of glamour with a quirky baker boy cap and sleek leather handbag

Glam girl: The beauty kept things comfortable for the outing in all-black, but maintained a usual hint of glamour with a quirky baker boy cap and sleek leather handbag

Her brother David, 42, helped relaunch the sportswear heritage label with Irish designer Daniel Kearns last year, and was the man of the hour when he arrived at the show with his stylish 15-year-old son Romeo in tow. 

The former Manchester United star kept things simple in a black T-shirt and matching trousers, layered beneath a smart navy coat.

In his usually slick style however, he tied his look together with bright white sports trainers and a dark pair of Wayfarer sunglasses as he headed inside, to take his place on the FROW.

Joanne confirmed she had welcomed a daughter named Peggy with her beau Kris in December, with an array of heart-warming Instagram snaps.

Doting dad: Kris also looked stylish for the outing, matching his girlfriend's choice of headgear, which he teamed with a fitted zip-up jacket, which featured lapels

Doting dad: Kris also looked stylish for the outing, matching his girlfriend's choice of headgear, which he teamed with a fitted zip-up jacket, which featured lapels

Trendy: In his usually slick style however, he tied his look together with bright white sports trainers

Trendy: Her older brother David Beckham arrived for the event looking typically fasionable

Family affair: While Victoria and the couple's other three children were not present, David was also supported by mother Sandra, clad in a casual striped T-shirt and skinny jeans

Family affair: While Victoria and the couple's other three children were not present, David was also supported by mother Sandra, and his son Romeo

Sharing an adorable black and white photo of Kris cradling their baby girl, she announced to followers: 'THE DAY OUR LIFE CHANGED FOREVER...

'Such an amazing feeling starting our own family , the love I have for our little princess Peggy is one that is so unconditional!'

Sharing further snaps of herself and Kris leaving the hospital with their newborn nestled in a baby carrier, she went on to thank her Big Brother star beau for being so supportive during the birth.

She added: 'I'd never of be able to do it without the love of my life ... @krissydonners you was my strength ! Thank you... ❤️ #myfamily.' 

'The day our life changed': Joanne confirmed she had welcomed daughter Peggy with her Big Brother star boyfriend Kris Donnelly in December, with a  heart-warming Instagram

'The day our life changed': Joanne confirmed she had welcomed daughter Peggy with her Big Brother star boyfriend Kris Donnelly in December, with a heart-warming Instagram

Infatuated: She said after the birth: 'Such an amazing feeling starting our own family , the love I have for our little princess Peggy is one that is so unconditional !'

Infatuated: She said after the birth, 'Such an amazing feeling starting our own family, the love I have for our little princess Peggy is one that is so unconditional'